2022-01-17
1. The frequency is different
According to the frequency spectrum division table formulated by the Institute of Electrical and Electronics Engineers (IEEE), the low frequency frequency is 30~300kHz, the intermediate frequency frequency is 300~3000kHz, the high frequency frequency is 3~30MHz, and the frequency range of 30~300MHz is very high frequency. 300~1000MHz is UHF.The voltage provided by the power board generally has a frequency of 0 (DC power) or 50Hz (AC power). The signal can be said to be high frequency or low frequency (or other frequencies), but the power board is not easy to say. It is only used for power supply, and the frequency is very low. If you really want to say it, it is only low frequency.